drm/i915/icl: Gen11 forcewake support

The main difference with previous GENs is that starting from Gen11
each VCS and VECS engine has its own power well, which only exist
if the related engine exists in the HW.
The fallback forcewake request workaround is only needed on gen9
according to the HSDES WA entry (1604254524), so we can go back to using
the simpler fw_domains_get/put functions.

BSpec: 18331

v2: fix fwtable, use array to test shadow tables, create new
    accessors to avoid check on every access (Tvrtko)
v3 (from Paulo): Rebase.
v4:
  - Range 09400-097FF should be FORCEWAKE_ALL (Daniele)
  - Use the BIT macro for forcewake domains (Daniele)
  - Add a comment about the range ordering (Oscar)
  - Updated commit message (Oscar)
v5: Rebased
v6: Use I915_MAX_VCS/VECS (Michal)
v7: translate FORCEWAKE_ALL to available domains
v8: rebase, add clarification on fallback ack in commit message.
v9: fix rebase issue, change check in fw_domains_init from IS_GEN11
    to GEN >= 11
v10: Generate is_genX_shadowed with a macro (Daniele)
     Include gen11_fw_ranges in the selftest (Michel)
v11: Simplify FORCEWAKE_ALL, new line between NEEDS_FORCEWAKEs (Tvrtko)

Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Acked-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180302161501.28594-6-mika.kuoppala@linux.intel.comSigned-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>

drivers/gpu/drm/i915/i915_reg.h

@@ -7998,9 +7998,13 @@ enum {
 #define   VLV_GTLC_PW_RENDER_STATUS_MASK	(1 << 7)
 #define  FORCEWAKE_MT				_MMIO(0xa188) /* multi-threaded */
 #define  FORCEWAKE_MEDIA_GEN9			_MMIO(0xa270)
+#define  FORCEWAKE_MEDIA_VDBOX_GEN11(n)		_MMIO(0xa540 + (n) * 4)
+#define  FORCEWAKE_MEDIA_VEBOX_GEN11(n)		_MMIO(0xa560 + (n) * 4)
 #define  FORCEWAKE_RENDER_GEN9			_MMIO(0xa278)
 #define  FORCEWAKE_BLITTER_GEN9			_MMIO(0xa188)
 #define  FORCEWAKE_ACK_MEDIA_GEN9		_MMIO(0x0D88)
+#define  FORCEWAKE_ACK_MEDIA_VDBOX_GEN11(n)	_MMIO(0x0D50 + (n) * 4)
+#define  FORCEWAKE_ACK_MEDIA_VEBOX_GEN11(n)	_MMIO(0x0D70 + (n) * 4)
 #define  FORCEWAKE_ACK_RENDER_GEN9		_MMIO(0x0D84)
 #define  FORCEWAKE_ACK_BLITTER_GEN9		_MMIO(0x130044)
 #define   FORCEWAKE_KERNEL			BIT(0)

drivers/gpu/drm/i915/intel_uncore.h

@@ -37,6 +37,12 @@ enum forcewake_domain_id {
 	FW_DOMAIN_ID_RENDER = 0,
 	FW_DOMAIN_ID_BLITTER,
 	FW_DOMAIN_ID_MEDIA,
+	FW_DOMAIN_ID_MEDIA_VDBOX0,
+	FW_DOMAIN_ID_MEDIA_VDBOX1,
+	FW_DOMAIN_ID_MEDIA_VDBOX2,
+	FW_DOMAIN_ID_MEDIA_VDBOX3,
+	FW_DOMAIN_ID_MEDIA_VEBOX0,
+	FW_DOMAIN_ID_MEDIA_VEBOX1,
 
 	FW_DOMAIN_ID_COUNT
 };
@@ -45,9 +51,14 @@ enum forcewake_domains {
 	FORCEWAKE_RENDER	= BIT(FW_DOMAIN_ID_RENDER),
 	FORCEWAKE_BLITTER	= BIT(FW_DOMAIN_ID_BLITTER),
 	FORCEWAKE_MEDIA		= BIT(FW_DOMAIN_ID_MEDIA),
-	FORCEWAKE_ALL = (FORCEWAKE_RENDER |
-			 FORCEWAKE_BLITTER |
-			 FORCEWAKE_MEDIA)
+	FORCEWAKE_MEDIA_VDBOX0	= BIT(FW_DOMAIN_ID_MEDIA_VDBOX0),
+	FORCEWAKE_MEDIA_VDBOX1	= BIT(FW_DOMAIN_ID_MEDIA_VDBOX1),
+	FORCEWAKE_MEDIA_VDBOX2	= BIT(FW_DOMAIN_ID_MEDIA_VDBOX2),
+	FORCEWAKE_MEDIA_VDBOX3	= BIT(FW_DOMAIN_ID_MEDIA_VDBOX3),
+	FORCEWAKE_MEDIA_VEBOX0	= BIT(FW_DOMAIN_ID_MEDIA_VEBOX0),
+	FORCEWAKE_MEDIA_VEBOX1	= BIT(FW_DOMAIN_ID_MEDIA_VEBOX1),
+
+	FORCEWAKE_ALL = BIT(FW_DOMAIN_ID_COUNT) - 1
 };
 
 struct intel_uncore_funcs {

drivers/gpu/drm/i915/selftests/intel_uncore.c

@@ -61,11 +61,20 @@ static int intel_fw_table_check(const struct intel_forcewake_range *ranges,
 
 static int intel_shadow_table_check(void)
 {
-	const i915_reg_t *reg = gen8_shadowed_regs;
-	unsigned int i;
+	struct {
+		const i915_reg_t *regs;
+		unsigned int size;
+	} reg_lists[] = {
+		{ gen8_shadowed_regs, ARRAY_SIZE(gen8_shadowed_regs) },
+		{ gen11_shadowed_regs, ARRAY_SIZE(gen11_shadowed_regs) },
+	};
+	const i915_reg_t *reg;
+	unsigned int i, j;
 	s32 prev;
 
-	for (i = 0, prev = -1; i < ARRAY_SIZE(gen8_shadowed_regs); i++, reg++) {
+	for (j = 0; j < ARRAY_SIZE(reg_lists); ++j) {
+		reg = reg_lists[j].regs;
+		for (i = 0, prev = -1; i < reg_lists[j].size; i++, reg++) {
 			u32 offset = i915_mmio_reg_offset(*reg);
 
 			if (prev >= (s32)offset) {
@@ -76,6 +85,7 @@ static int intel_shadow_table_check(void)
 
 			prev = offset;
 		}
+	}
 
 	return 0;
 }
@@ -90,6 +100,7 @@ int intel_uncore_mock_selftests(void)
 		{ __vlv_fw_ranges, ARRAY_SIZE(__vlv_fw_ranges), false },
 		{ __chv_fw_ranges, ARRAY_SIZE(__chv_fw_ranges), false },
 		{ __gen9_fw_ranges, ARRAY_SIZE(__gen9_fw_ranges), true },
+		{ __gen11_fw_ranges, ARRAY_SIZE(__gen11_fw_ranges), true },
 	};
 	int err, i;